Question

FeS + HNO₃ + H₂O \(\rightarrow\) Fe(NO₃)₃ + Fe₂(SO₄)₃ + NH₄NO3

Answer 1

\(\overset{+2}{Fe}\overset{-2}{S}+H\overset{+5}{N}O_3+H_2O\rightarrow\overset{+3}{Fe}\left(NO_3\right)_3+\overset{+3}{Fe}_2\left(\overset{+6}{S}O_4\right)_3+\overset{-3}{N}H_4NO_3\) quá trình OXH : \(3\overset{+2}{Fe}+3\overset{-2}{S}\rightarrow3\overset{+3}{Fe}+3\overset{+6}{S}+27e|\times8\)

quá trình khử : \(\overset{+5}{N}+8e\rightarrow\overset{-3}{N}|\times27\)

\(\Rightarrow\) \(24FeS+78HNO_3+15H_2O\rightarrow8Fe\left(NO_3\right)_3+8Fe_2\left(SO_4\right)_3+27NH_4NO_3\)